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Emmy Rossum and Georgina Chapman

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After the last gorgeous gown left the runway, Emmy Rossum headed backstage and congratulated Marchesa designer Georgina Chapman on a job well done. Rossum was scoping out dresses for the many red-carpet appearances she'll be making while promoting her next film in November.

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Leighton Meester

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"I'm so distracted! There are so many people here, so many good-looking people," said Leighton Meester (in a Proenza Schouler outfit and Cathy Waterman jewelry) while scanning the crowd at Proenza Schouler's Spring 2010 runway show. Across the runway, Courtney Love (not shown) chatted with her front-row neighbors before watching the bright, tie-dyed collection come down the catwalk. "The clothes are innovative, young and cool. Kind of like me!" she said.

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Mary-Kate Olsen and Ashley Olsen

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The duo displayed some serious bartending skills at Bergdorf Goodman during Fashion's Night Out shopping extravaganza, and the store returned the favor by hosting a fete in honor of the design duo's The Row Spring 2010 collection.

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Lauren Conrad

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Lauren Conrad showed off her perfect posture and elegant updo in the front row of the Nanette Lepore fashion show. The former Hills star also checked out 3.1 Phillip Lim and Rebecca Minkoff's Spring 2010 collections this week.

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Alexa Chung and Olivia Thirlby

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Mary J. Blige, Serena Williams and Alicia Keys

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In the name of women and fashion, Grammy-winning singers Mary J. Blige (wearing Lorraine Schwartz jewelry) and Alicia Keys joined tennis great Serena Williams at a party benefiting the Foundation For the Advancement of Women Now (FFAWN), hosted by Gucci at their Fifth Avenue boutique. New York's Empire State Building was illuminated in white, yellow and purple lights to honor the official Gucci for FFAWN day.